Method of vacuum casting molten metal
US3996992A · kind A · utility
Inventor
Key dates
| Filing date | Mar 17, 1975 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Mar 17, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D31/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An elongated movable water cooled mold of any desired cross section has an open bottom end which is lowered into a pot of molten metal a predetermined distance with the metal being pulled into the mold under vacuum operated by suitable controls for establishing the desired length of the casting or billet. Water is supplied to the mold while still in the pot to permit the casting to harden and the mold is then removed therefrom and moved to a position close to floor level where termination of the water supply allows the contained heat in the casting to reheat the mold and expand it sufficiently so that the casting can drop free of the mold upon release of the vacuum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.